// WaitBlpPosition will wait for the filtered replication to reach at least
// the provided position.
func WaitBlpPosition(ctx context.Context, mysqld MysqlDaemon, sql string, replicationPosition string) error {
position, err := replication.DecodePosition(replicationPosition)
if err != nil {
return err
}
for {
select {
case <-ctx.Done():
return ctx.Err()
default:
}
qr, err := mysqld.FetchSuperQuery(ctx, sql)
if err != nil {
return err
}
if len(qr.Rows) != 1 {
return fmt.Errorf("QueryBlpCheckpoint(%v) returned unexpected row count: %v", sql, len(qr.Rows))
}
var pos replication.Position
if !qr.Rows[0][0].IsNull() {
pos, err = replication.DecodePosition(qr.Rows[0][0].String())
if err != nil {
return err
}
}
if pos.AtLeast(position) {
return nil
}
log.Infof("Sleeping 1 second waiting for binlog replication(%v) to catch up: %v != %v", sql, pos, position)
time.Sleep(1 * time.Second)
}
}
// WaitBlpPosition will wait for the filtered replication to reach at least
// the provided position.
func WaitBlpPosition(mysqld MysqlDaemon, sql string, replicationPosition string, waitTimeout time.Duration) error {
position, err := replication.DecodePosition(replicationPosition)
if err != nil {
return err
}
timeOut := time.Now().Add(waitTimeout)
for {
if time.Now().After(timeOut) {
break
}
qr, err := mysqld.FetchSuperQuery(sql)
if err != nil {
return err
}
if len(qr.Rows) != 1 {
return fmt.Errorf("QueryBlpCheckpoint(%v) returned unexpected row count: %v", sql, len(qr.Rows))
}
var pos replication.Position
if !qr.Rows[0][0].IsNull() {
pos, err = replication.DecodePosition(qr.Rows[0][0].String())
if err != nil {
return err
}
}
if pos.AtLeast(position) {
return nil
}
log.Infof("Sleeping 1 second waiting for binlog replication(%v) to catch up: %v != %v", sql, pos, position)
time.Sleep(1 * time.Second)
}
return fmt.Errorf("WaitBlpPosition(%v) timed out", sql)
}
